Apparatus for providing bails on cans



March 22, 1966 Filed Sept. 12, 1962 APPARATUS FOR PROVIDING BAILS ONCANS R. A. HEISLER 3,241,578

17 Sheets-Sheet 1 RAYMOND A. HEISLER BY WM /M /12 im ATTORNEY March22,1966 R. A. HElsLeR APPARATUS FOR PROVIDING BAVILS ON CANS 17Sheets-Sheet 2 Filed Sept. 12. 1962 INVENTOR. RAYMOND A. HEISLER 7/2/2UM? ML.,

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APPARATUS FOR PROVIDING BAILS ON CANS 1'7 Sheets-Sheet 3 Filed Sept. 12,1962 L@2:02 L77 w06 FIG. 7

INVENTOR. RAYMOND A. HEISLE R BYW Mam i ATTOR/qg)7 March 22, 1966 R. A.HElsLER 3,241,578

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INVENTOR. RAYMOND A. HEISLER ATTQ RNEY RQA. HEISLER 3,241,578

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RAYMOND A. HEISLER WWW/M Wam ATTORNEY March 22, 1966 R. A. HElsLERAPPARATUS FOR PROVIDING BAILS ON CANS 17 Sheets-Shea?I '7 Filed Sept.12, 1962 Q .DI

INVENTOR RAYMOND A. HEISLER www MM ATTOR EY March 22, 19,66 R. A,HElsLER 3,241,578

APPARATUS FOR PROVIDING BAILS ON GANS Filed Sept. 12, 1962 1'7Sheets-Sheet 8 J FIG' 6 RAYMOND AfE/ESITEO' BY/M/ MM AT TORN y March 22,1966 R. A. HElsLER 3,241,578

PPARATS FOR PROVIDING BAILS 0N CANS Filed Sept. 12, 1962 17 Sheets-Sheet9 INVENTOR.

RAYMOND A. HEISLER BY WffV//Awy MMM ATTORNEY March 22, 1966 R, A,HElsLE-R 3,241,578

AFPARATUS FOR PROVIDING BAILS ON CANS Filed Sept. l2, 1962 17Sheets-Sheet 10 |58a 1 t |57 :se |68 |73 :7o

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APPARATUS FOR PROVIDING BAILS 0N CANS Filed Sept. 12, 1962 17Sheets-Sheet 12 INVENTOR. RAYMOND A. HEISLER BY m ATTORNEY March 22,1966 R. A. HElsLER APPARATUS FOR PROVIDING BAILS ON CANS 17 Sheets-Sheet13 yFiled Sept. 12, 1962 INVENTOR. RAYMOND A. HEISLER ATTORNEY March 22,1966 R. A. HExsLER APPARATUS FOR PROVIDING BAILS 0N CANS 17Sheets-Shea?I 14 Filed Sept. 12, 1962 INVENTOR. RAYMOND A. HEISLER 7'/f/Lzm, TORNEY gm .DI

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ATTORNEY March 22, 1966 R. A. HElsLl-:R

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United States Patent O 3,241,578 APPARATUS FR PRO'WDING BAILS 0N CANSRaymond A. Heisler, Wayne, NJ., assignor to The Heislex Company,Caldwell, NJ. Filed Sept. 12, 1962, Ser. No. 223,015 24 Claims. (Cl.140-93) This invention relates to improvements in apparatus for andprocesses of providing containers with bails, and, morek specicallyproviding eared cans with wire bails.

Initially bails were made in a cumbersome andinefficient manner in whichthe ends of a precut and performed bail, were bent in such a manner asto permit hand assembly. As the use of eared cans increased so also didthe importance of providing a bail that could be economicallymanufactured and inserted. Apparatus for the high speed production ofbails designed to be inserted by hand has been accomplished, but suchbails not only require h-and labor with attaching apparatus but alsoreq-uire the use of a bail relatively easy to dislodge or disengage fromthe can.

With the foregoing and other considerations in mind the presentinvention contemplates an effective and efficient selection andorientation of eared cans and the automatic formation of a b-ail and theeffective and efficient insertion of the ends of the -bail into the earsof such cans.

Pursuant to the invention in Various of its aspects there is providedapparatus arranged to receive cans from a delivery source, and providingmeans at a feeding station to space such cans upon a conveying means,means to regulate the ow of said cans in a steady even manner and toorient these cans in such a manner that cans with twoproperly placedears are detected for the insertion of bails, those cans with earsmissing being rejected and passed through the apparatus withoutactivating the bail making mechanism; apparatus arranged to transportand control `the can without contacting the side of the can upon which afresh label may have been placed; apparatus that will receive a signaland, pursuant thereto, cause the apparatus to form a bail and/or insertbail ends into the ears of a can; apparatus that will take wire from a`storage'source, feed the wire, and, if necessary, cut it to apredetermined length, shape the wire, and fasten the wire in the form ofa bail to the ears of the can in a simple and effective manner.

In certain of its aspects the invention contemplates the provision of aby-pass conveyor system for passing -smaller cans through the apparatuswithout activating the bail making mechanism.

In certain other of its aspects the invention contem.

plates the provision of simple and effective means for providing canswith bails which is adaptable to either manual or automatic operation.

An important advantage of the invention in its various Vaspects is thatit enables the attachment of bails to cans in such a manner that it isvirtually impossible to accidentally remove or dislodge the bail fromthe can.

The invention accordingly comprises apparatus embodying the features ofconstruction, combination of elements, and arrangements of parts, an-dthe several steps and the relation and order of one or more of suchsteps with respect to each of the others, all as exemplified in thefollowing detailed disclosure the scope of the application of whichbeing indicated in the claims.

Further objects and advantages of this invention will become apparent asthe description of a preferred embodiment proceeds in connection withthe accompanying drawings, wherein:

FIGURE 1 is a general simplified isometric view of the machine;

FIG. 2 is a somewhat diagrammatic fragmentary plan "ice View showing thearrangement of major elements of the transporting and orienting means;

FIG. 3 is a somewhat diagrammataic fragmentary side View showing certainelements of the transporting and orienting means;

FIG. 4 is a fragmentary top view of the main conveyor showing the gatefeeding mechanism;

FIG. 5 is a fragmentary sectional View taken on the line 5-5 of FIG. 4;

FIG. 6 is a fragmentary cross Section of the conveyor taken on the line6-6 of FIG. 4;

FIG. 7 is a fragmentary top View of the transporting and orienting meansillustrating the orienting of the cans;

FIG. 8 is a fragmentary top view further along the conveyor showing thedetection station;

FIG. 9 is a framentary side view of the elements shown in FIG. 8;

FIG. l0 is a front view of the elements in the bail making and insertingstation;

' FIG. 10A is a fragmentary sectional view on the line 10A-10A of FIG.10;

FIG. 11 is an enlarged front view of the elements of the Wire feedingmechanism;

FIG. 12 is a partly sectional side view of the elements of the wirefeeding mechanism shown in FIG. 11;

FIG. 13 is an enlarged front view, with the can holding means omitted,showing the wire cut off and transferring mechanism;

FIG. 14 is a fragmentary sectional view taken on the line 14-14 of FIG.13 showing the cutting mechanism;

FIG. 15 is a sectional view of the spring loaded retractable nger on theline 15-15 of FIG. 13;

FIG. 15A is a fragmentary front view of an alternate form ofconstruction involving the use of a supplemental wire cut-off element;

FIG. 16 is an enlarged partly sectional side view showing the transferarm in detail;

FIG. 17 is an enlarged partly sectional side View showing the cut-offknife in detail;

FIG. 18 is an enlarged detail front view of the wire clamp block andassociated members;

FIG. 19 is a section view taken on the line 19-19 of FIG. 18;

FIG. 20 is an enlarged front view of thev wire clamp block with thelower die shoe engaging the wire;

FIG. 21 is a sectional view takenon the line 21--21 ofFIG. 20;

FIG. 22 is a fragmentary front view showing the wire at the moment oftransfer;

FIG. 23 is a fragmentary front view showing the wire being formed into aU;

FIG. 24 is a fragmentary front view showing the relative position of theupper and lower die shoes after forming the U;

FIG. 25 is a cross section of the contact blocks on the line 25-25 ofFIG. 22;

FIG. 26 is a cr-oss section of upper and lower dies on the line 26-26 ofFIG. 22;

FIG. 27 is a parti-al front view of -a curling die;

FIG.'28 is a cross section of the die taken on the line 28--28 of FIG.27;

FIG. 29 is -a cross section of the die taken on the line 29-29 of FIG.27;

FIG. 30 is a cross section of the die taken on the line 30-30 of FIG.27;

FIG. ,31 is a partial front view of an alternate groove coniigurationoff curling die;

FIG. 32 is a cross section of the die taken on the line 32-32 of FIG.31;

FIG. 33 is a cross section of the die taken on the line 33-33 of FIG.31;

FIG. 34 is a cross section of the die taken on the line 34-34 of FIG.31;

FIG. 35 is a partial view showing an enlarged View of the loop-formingsection of the groove;

FIG. 36 is a view of va swivel die in open position to an ear of a can;

FIG. 37 is a view of -a swivel die closed to the ear of a can with theloop formed and inserted;

FIG. 38 is a View of a swivel die closed to the ear of of a can;

FIG. 39 is a fragmentary front view showing the bail entering thecurling die;

FIG. 39A is a section on the yline 39A39A of FIG39;

FIG. 40 is fragmentary front view showing the bail formed and inserted;

41 is a front view showing cover stop arm mechanism;

FIG. 42 is a partial front view showing cam elements used in cove-r stop`ar-rn mechanism;

FIG. 43 is a side view of FIGS. 41 and 42;

FIG. 44 is a top view taken on the line 44-44 of FIG. 4l;

FIG. 45 is 4a front view of the clutch and trip mechanism;

FIG. 46 is a side view of the clutch and trip mechanism;

FIG. 46A is a fragmentary top view of the mechanism shown in FIG. 46 ina slightly more advanced position;

FIG. 47 is a sectional View taken on the line 47-47 of FIG. 45';

FIG. 48 is a sectional View taken on the line 48-48 of FIG. 46A;

FIG. 49 is a rear view of the main plate assembly;

FfIG. 50 is a top view of conveyor with intermediate chains;

FIG. 51 -is `a sectional view on the line 51-51 of FIG. 50;

FIG. 52 is a sectional view on the line 52-52 of FIG. 50;

FIG. 53 is a side view of the drive system;

FIG. 54 is a f-ront view of the drive system;

FIG. 55 is a sectional view of a sprocket drive unit;

FIG. 56 is la front view of an alternate form of construction;

FIG. 57 is a side view thereof;

FIG. 58 is a sectional view on the line 58-58 of FIG. 56; and

FIG. 59 is an operat-ion diagram of the cams and clutch mechanism.

In one exemplified construction, the general arrangement of the majorelements is shown in FIG. 1. The front end of the machine contains thebail forming and inserting apparatus and also acts as a support for theconveying system. Upon a base '70, rest two side frames 71. Joining theside frames 71 is a main plate 72. Conveyor side-rails 75 are supportedin the front by the main plate 72 and in the rear by a support frame 76.Upon the side rails 75 are guide rails 77 which restrain a one-galloncan 80 in its lateral movement.

As shown in FIGS. 2 and 3, the side rails 75 support a front drive shaft81 and a rear shaft 82. Between shafts 81 and 82 are a high speed carrychain 83 driven from the shaft 81, by mechanism hereinafter to bedescribed, and slow speed carry chain 84 driven Vdirectly from the shaft81. For example, the chain 83 may move at one hundred linear feet perminute and the chain S4 at fifty feet per minute. An incoming feedingsystem 86 and an outlet conveyor system 87 are indicated in phantomoutline in FIG. 3. The incoming feeding system 86 may be a part of acontinuous operation in which -transfer stations and conveyors bring thecans 80 through various operations such as filling, capping,label-applying, and any other operations requiring completion beforeapplying the bail to the can. The Outlet conveyor system 87 maytransport the ibailed can 80 to each such subsequent operations aspacking and shipping. The length` arrangement and operative speeds ofsystems 86 and 87 may, of course, be varied in accordance withindividual requirements and conditions.

In order that the flow of cans 80, as received from the incoming feedingsystem 86, be properly spaced on the conveyor system provided by thechains 83 and 84, a gate feeding mechanism is provided to regulate therelease of cans onto this conveyor system. This gate feeding mechanismoperates in coordinated and direct relationship with the conveyor sothat a steady, even flow of cans 80 is paced with the machine operation.As shown in FIGS. 4 and 5, the exemplified gate feeding mechanismutilizes the rear shaft 82 upon which a cam 89 is mounted. Activated bythis cam 89 is rotatable cam follower 90 carried by an activating elbowarm 91 which is pivoted on a rod 92 mounted on the conveyor side rails75. The arm 91 is connected by a link 93 to one of a pair ofinterconnected front stop arms 94 which are pivotally mounted on a shaft95 attached to the conveyor side rails 75. To protect the can 80 fromdamage by the gate feeding mechanism it is found preferable to provideinterconnected rear stop arms 96 also pivotally mounted on shaft 95, andnormally retained against the end of a slot 96a in a plate 96b by atension spring 97, but movable in a counter-clockwise direction (FIG. 5)to avoid jamming by a misformed or misplaced can. Interconnecting frontstop arms is rod 97a upon which is mounted plate 96h and spring 97. In alike manner rear stop arms 96 are interconnected by a rod 98a whichengages the slot 96a of plate 96b and also to which the spring 97 isattached. On the front stop arms 94 are integrally carried opstandingstop fingers 98. Likewise on the rear stop arms 96 are integrallycarried upstanding fingers 99.

In use, the gate feeding mechanism regulates the flow of can 80 in thefollowing manner. Cam 89 in the position as shown in FIG. 5, with thecam follower 90 on the low part of the cam 89, causes the front stoparms 94 to be in the up position. In this position the fingers 98 willbe engaged by the lower rim of a can 80a thus impeding the flow on theconveyor of this can and any cans behind it. The carry chains 83 and 84continue to move, and slide under can 80a until such time as the riseportion of the cam 89 engages cam follower 90. When this occurs thefront stop arms 94 drop down and the fingers 98 disengage from the rimof the can 80a. Meanwhile rear stop arm 96 rises up and the fingers 99impede the progress of a following can 80b by the engagement of fingers99 with the rim of that can. When the rotation of the cam 89 againbrings the low portion 100 in line with the cam follower 90, the rearstop arms 96 is lowered so that fingers 99 disengage the rim of can 80b,permitting that can to move forward on the carry chains 83 and 84 andthen to engage the fingers 93 of the now raised front stop arms 94.

After the release of a can from fingers 98, the carry chains 83 and 84-and move the can forward. The means to orient a can 80 and prevent itfrom tipping is shown in FIG. 6 in which an upper side guide 101 ismounted so as to just contact the upper rim of a can 80. The upper sideguide 101 is mounted on supports 102 attached to side rail 75. An earguide bar 103 is located on the opposite side of the conveyor and isadjustably mounted to ear guide supports 104 which are attached to siderails 75.

FIG. 7 shows the action of the can 80 as it is moved forward on theconveyor system for the purpose of being oriented. A can 80 with twoears 106i and 107 may, when released by the fingers 98, have the ears inany position relative to the ear guide bar 103. The designation of theears by two reference numerals is only for the purpose of clarity ofdescription since both ears, as

constructed, are intended to be identical and on diametrically oppositesides.

As released, a can S0 at position A may have ears 106 and 107 in aposition away from the ear guide bar 103. When operating, the high speedcarry chain 83 moves at a speed faster than that of slow speed carrychain 84. However, both carry chains 83 and 84 travel in the samedirection as indicated by the arrows. The can 80 Iis retained in thedesired position by guide rails 77 (see FIG. 6). The diiference in speedof the carry chains 83 and 84 induces a rotating motion to the can 80.This rotation is illustrated by the difference of location of the ears106 and 107 as the can 80 moves from position A to position B. As thecan proceeds down the conveyor, the rotation continues until an ear,such as the one designated 107, contacts the ear guide bar 103 atposition C. When the ear 107 makescontact with the ear :guide bar 103the rotation of the can 80 ceases, and the now-oriented can moves downthe conveyor at a speed substantially that of the slower carry chain 84.The positions C and D are those of a can 80 after the orienting has beencompleted. It is of note that cans 80 with one or two ears missing areso-metimes fed from the incoming feeding system 86 through the gatefeeding mechanism and the conveyor system. When la can 80 with one earmissing is moved down the conveyor the can 80 will rotate until itsremaining ear engages the ear `guide bar 103. An earless can 80 willcontinue to rotate until passed through to the outlet conveyor system87.

In the present instance, the importance of the ear guide bar 103 and itsrelation to the contacting ear 107 is demonstrated in FIG. 8. At theposition E on the conveyor the ear 107 is in contact with ear guide bar103 wh-ile ear 106, spaced diametrically opposite is in position at adetection station to activate further operations.

In the exemplified apparatus, a trigger bar 110 is pivotally mounted ona support bracket 111 by a pin 112. The trigger bar 110v is arranged tomove toward or away from can 80 in the plane of ear 106 by or againstthe pressure of the spring-urged limited-movement plunger 113 of a valve114 mounted on bracket 111. As the can S0 mofves on the conveyor fromposition D to position E, the ear 106 as it moves forward causes thetrigger bar 110 to move outwardly from repose as shown in phantomoutline to the activation position as shown. The movement of bar 110outwardly also causes plunger 113 to move into the valve 114 to open thevalve for later operations hereinafter to be described.

The arrangement shown in the present instance enables the detection ofcans with two properly placed ears as contrasted with cans with only oneear or with no ears at all. Whereas a can with two properly placed earswill cause the trigger bar 110 to move outwardly, a can with only oneear will rotate until that ear contacts ear guide bar 103 whence it willproceed along the conveyor and as it passes the trigger barr110 atposition E there will be no ear to contact the trigger bar 110. Thus thevalve 114 will not be activated. In a like manner, if a can has no ear,the can will travel and rotate on the conveyor but in passing thedetection station no ear will be in position to engage the trigger bar110.

The guide bar 103 and upper side g-uide 101 terminate just forward ofthe detection station at position E (FIG. 8). The can 80, stilltraveling on chains 83 and 84 and no longer having the restraininginfluence of ear guide bar 103, will once again start to rotate. Byproperly selecting the distance from position E to F, the distance beingcalculated from the speed yof the conveyor and the differential in speedof chains 83 and 84, the can is caused to turn so that the ears atposition F are in a generally right angled relationship to the conveyor,position F being the point where the bail insertion takes place.

Cil

In the present instance the conveying elements are so constructed andarranged as to eliminate contact with the sides of can 80. The gatefeeding mechanism with fingers 98 and 99 as well as guide rails 77engage only the bottom rim of the can 80. The upper side guide 101contacts only the upper rim of can while ear guide bar 103 is spaced soas to contact yonly ear 107 and trigger bar is also spaced to contactonly ea'r 106. Thus any can with a label normally applied to the side ofthe can is not likely to have the label contacted by any of the elementsenumerated above.

The bail making and inserting station comprises many elements andmotions. Many of these motions occur in sequences. To best illustrateand describe the many interdependent elements and motions, both 'generalviews and enlarged views are -used in connection with the followingportion of the disclosure dealing with this station, and, insofar aspractical, each separate motion and action is illustra-ted anddescribed.

The mechanism at this station, shown in FIG. 10, provides the followingfunctions:

(A) It is actuated in response to the operation yof the valve 114 shownin FIGS. 8 and 9, by means including a clutch mechanism which engages acrankshaft 116 and causes it -to rotate.

(B) A wire feed unit, driven from the crank-shaft 116, draws wire 117from a supply reel (not shown) through a wire straightener(conventional) 118 to the position shown in FIG. 10.

(C) At a predetermined point of rotation of the crankshaft 116, the wire117 is cut to provide a short wire 119 which is transferred to bendingdies, bent into a generally U shape, then becoming a bail wire 121, andmoved to a point where the ends of the bail wire 121 may be formed intoloops.

(D) While the bail wire 121 is being formed into a bail, the can 80 withears 106 and 107 moves into the position shown at F in FIG. 8 under thebail forming apparatus, whereupon the ends of the bail wire 121 areformed into loops, and the loops as they are formed enter into the ears106 and 107 of the can 80.

(E) The can 80 with the bail now attached is released from this stationand proceeds to a disposition 'on the outlet conveying system 87.

A preferred wire feed and cut off mechanism is illustrated in FIGS. 10,1l, and 12. Wire 117 4after moving through wire straightener 118, entersa pair of feed rolls 123 and 124. The driven feed roll 123 receives itspower from crankshaft 116 through bevel gear 125 to pinion 126. The feedrolls 123 and 124 have Itoothed porti-ons 12611 and 126b respectively,which mesh with each other, so that driven roll 123 drives rear roll124. Being meshed, the rolls 123 and 124 turn toward each other and areso spaced that wire 117 is frictionally engaged in a pair of grooves126C and 126d formed in the respective feed rolls 123 and 124. The rearroll 124 is spring biased toward the front roll 123 by a spring 128which loads a feed roll bracket 129 pivotally attached at 129a on themain plate 72. The desired tension of the spring bias is secured byadjusting a nut 130.

The wire cutting is performed by apparatus which includes an element 131having a cutting edge 131a and mounted on a cutting arm 132 pivoted at13211 one end of which terminates with a cam follower 133, activated bya rise 133a (FIG. 14) on a cam 134 fixed to the crankshaft 116. Wire 117is fed through bushing 134a in a die block and the cutting edge 131a isadapted to cut the wire 117 at the point where it leaves the bushing134a. As the wire 117 would still tend to move forward if driven byrolls 123 and 124, it is of benefit to the wire 117 and rolls 123 and124 to relieve the spring bias on rear roll 124 at the time of cutting.Accordingly the rise 133a on the cam 134 causes the upper part of thearm 132 to move back, a roller pin 136 on arm

8. MECHANISM FOR FORMING AND INSERTING WIRE BAILS INTO THE EARS OF EAREDCANS, COMPRISING BENDING DIES HAVING WIRE-ENGAGING PORTIONS IN A SINGLEPLANE, MEANS TO FEED WIRE INTO POSITION IN SAID PLANE BETWEEN SAIDBENDING DIES, MEANS TO MOVE AT LEAST ONE BENDING DIE TOWARD THE OTHER INSAID PLANE TO SHAPE AND WIRE INTO A BAIL, A PAIR OF DIE MEANS PROVIDINGGUIDEWAYS SUBSTANTIALLY IN SAID PLANE TO CONDUCT THE ENDS OF THE BAILFROM THE BAIL-END-RECEIVING ENTRANCE PORTIONS THEREOF INTO THE EARS OF ACAN, MEANS TO MOUNT SAID DIE MEANS FOR MOVEMENT OF THE EXIT PORTIONS OFTHE GUIDEWAYS TOWARD AND AWAY FROM THE EARS OF A CAN ON AXES NEAR SAIDENTRANCE PORTIONS, AND MEANS TO MOVE THE ENDS OF THE BAIL INTO, THRU,AND OUT OF SAID GUIDEWAYS WHILE MAINTAINING SAID DIE MEANS WITH THEIRINNER EDGES IN CONTACT WITH THE RESPECTIVE EARS, SAID GUIDEWAYS BEINGCURVED TO CURVE THE ENDS OF THE BAIL TO INSERT THEM IN THE EARS OF ACAN.